Power Supply System of Air Conditioning Device, Air Conditioning Device, and Data Center

Abstract

An air conditioning device includes an alternating current (AC) bus, a direct current (DC) bus, a first AC/DC circuit, a first DC/AC circuit, and a backup power supply apparatus. The AC bus is connected to two power supplies through a switching circuit. The backup power supply apparatus is connected to the DC bus or the AC bus. The backup power supply apparatus provides electric energy for the DC bus or the AC bus when the two power supplies are switched or fail, so that the first air conditioning load is not powered off. The backup power supply apparatus may supply power to the load when the two power supplies are switched or fail.

1 . A power supply system of an air conditioning device; and comprising:
 an alternating current (AC) bus configured to connect to two power supplies through a switching circuit;   a direct current (DC) bus;   a first AC/DC circuit comprising:
 a first AC/DC circuit input terminal connected to the AC bus; and 
 a first AC/DC circuit output terminal connected to the DC bus; 
   a first DC/AC circuit comprising:
 a first DC/AC circuit input terminal connected to the DC bus; and 
 a first DC/AC circuit output terminal configured to supply power to a first air conditioning load; and 
   a backup power supply apparatus connected to the DC bus or to the AC bus, and wherein the backup power supply apparatus is configured to provide electric energy to the DC bus or the AC bus when the two power supplies switch or fail to prevent the first air conditioning load from powering off.   
     
     
         2 . The power supply system of  claim 1 , wherein the backup power supply apparatus is connected to the DC bus, and wherein the backup power supply apparatus comprises:
 a battery pack comprising a first voltage; and   a bidirectional DC/DC circuit comprising a DC/DC first terminal and a DC/DC second terminal,   wherein the DC/DC first terminal is connected to the DC bus, wherein the DC/DC second terminal is connected to the battery pack, and wherein the bidirectional DC/DC circuit is configured to:
 convert the first voltage into a second voltage of the first air conditioning load; and 
 convert a DC bus voltage of the DC bus into the first voltage to charge the battery pack. 
   
     
     
         3 . The power supply system of  claim 1 , wherein the backup power supply apparatus is connected to the AC bus, wherein the backup power supply apparatus comprises:
 a battery pack comprising a first voltage; and   a bidirectional AC/DC circuit comprising:
 a bidirectional AC/DC circuit input terminal is connected to the AC bus; and 
 a bidirectional AC/PC circuit output terminal is connected to the battery pack, 
 wherein the bidirectional AC/DC circuit is configured to:
 convert AC power of the AC bus into DC power to charge the battery pack; and 
 convert the first voltage into a second voltage that matches a third voltage of the AC bus to supply power to the first air conditioning load. 
 
   
     
     
         4 . The power supply system of  claim 1 , further comprising a second AC/DC circuit comprising:
 a second AC/PC circuit input terminal connected to the AC bus; and   a second AC/DC circuit output terminal connected to the DC bus.   
     
     
         5 . The power supply system of  claim 1 , further comprising a second DC/AC circuit comprising a second DC/AC circuit input terminal and a second DC/AC circuit output terminal, wherein the second DC/AC circuit input terminal is connected to the DC bus, and wherein the second DC/AC circuit output terminal is configured to supply second power to a second air conditioning load. 
     
     
         6 . The power supply system of  claim 1 , wherein the first air conditioning load comprises a fan, a compressor, or a pump. 
     
     
         7 . The power supply system of  claim 1 , wherein the first DC/AC circuit output terminal is configured to supply second power to at least two air conditioning loads. 
     
     
         8 . The power supply system of  claim 1 , further comprising:
 a switching circuit comprising:
 a first branch comprising a first branch first terminal and a first branch second terminal, wherein the first branch first terminal is configured to connect to a first power supply of the two power supplies; and 
 a second branch comprising a second branch first terminal and a second branch terminal; 
 wherein the second branch first terminal is configured to connect to a second power supply of the two power supplies, and 
 wherein the first branch second terminal and the second branch second terminal are connected together to connect to the AC bus; and 
   switching devices connected in series on both the first branch and the second branch, wherein the switching devices are configured to switch the first power supply and the second power supply.   
     
     
         9 . The power supply system of  claim 8 , wherein the first power supply comprises a first mains supply and a first diesel generator, and wherein the second power supply comprises a second mains supply and a second diesel generator, and wherein the power supply system further comprises:
 a first automatic transfer switching (ATS) equipment, wherein the first branch first terminal is connected to the first power supply through the first ATS equipment, and wherein the first ATS equipment comprises:
 a first ATS equipment first input terminal configured to connect to the first mains supply; 
 a first ATS equipment second input terminal is configured to connect to the first diesel generator; and 
 a first ATS equipment output terminal connected to the first branch first terminal; and 
   a second ATS, wherein the second branch first terminal is connected to the second power supply through the second ATS, and wherein the second ATS comprises:
 a second ATS equipment first input terminal configured to connect to the second mains supply; 
 a second ATS equipment second input terminal configured to connect to the second diesel generator; and 
 a second ATS equipment a output terminal is connected to the second branch first terminal. 
   
     
     
         10 . The power supply system of  claim 8 , wherein the first power supply comprises a first mains supply and a first diesel generator, and wherein the second power supply comprises a second mains supply and a second diesel generator, and wherein the power supply system further comprises:
 a first automatic transfer switching equipment (ATS), wherein the first branch first terminal is connected to the first power supply through the first ATS, and wherein the first ATS comprises:
 a first ATS first input terminal configured to connect to the first mains supply; 
 a first ATS second input terminal configured to connect to the first diesel generator; and 
 a first ATS output terminal connected to the first branch first terminal; 
   an uninterruptible power supply (UPS) circuit comprising a UPS circuit first terminal, a UPS circuit second terminal, and a UPS circuit third terminal;   a low-voltage power distribution cabinet comprising a power distribution cabinet input terminal and a power distribution cabinet output terminal, wherein the power distribution cabinet output terminal is connected to the UPS first terminal;   a second ATS, wherein the second branch first terminal is connected to the second power supply through the second ATS, and wherein the second ATS comprises:
 a second ATS first input terminal configured to connect to the second mains supply; 
 a second ATS second input terminal configured to connect to the second diesel generator; and 
 a second ATS output terminal connected to the power distribution cabinet input terminal; and 
   an output power distribution cabinet comprising an output power distribution cabinet input terminal and an output power distribution cabinet output terminal, wherein UPS second terminal connected to the output power distribution cabinet input terminal, wherein the output power distribution cabinet output terminal is connected to the second branch first terminal; and   a battery, wherein the UPS third terminal is connected to the battery.   
     
     
         11 . The power supply system of  claim 8 , wherein the first power supply comprises a first mains supply and a first diesel generator, and wherein the second power supply comprises a second mains supply and a second diesel generator; and wherein the power supply system further comprises:
 a first automatic transfer switching equipment (ATS), wherein the first branch first terminal is connected to the first power supply through the first ATS, and wherein the first ATS comprises:
 a first ATS first input terminal configured to connect to the first mains supply; and 
 a first ATS second input terminal configured to connect to the first diesel generator; and 
 a first ATS output terminal; 
   a first uninterruptible power supply (UPS) circuit comprising a first UPS first terminal, a first UPS second terminal, and a first UPS third terminal;   a second UPS circuit comprising a second UPS first terminal, a second UPS second terminal, and a second UPS third terminal;   a first low-voltage power distribution cabinet comprising:
 a first low-voltage power distribution cabinet input terminal connected to the first ATS output terminal; 
 a first low-voltage power distribution cabinet output terminal connected to the first UPS first terminal; 
   a second ATS, wherein the second branch first terminal is connected to the second power supply through the second ATS, and wherein the second ATS comprises:
 a second ATS first input terminal configured to connect to the second mains supply; 
 a second ATS second input terminal configured to connect to the second diesel generator; and 
 a second ATS output terminal; 
   a first output power distribution cabinet comprising:
 a first output power distribution cabinet input terminal connected to the first UPS second terminal; and 
 a first output power distribution cabinet output terminal connected to the first branch first terminal; 
 a first battery connected to the first UPS third terminal; and 
   a second low-voltage power distribution cabinet comprising:
 a second power distribution cabinet input terminal connected to the second ATS output terminal; 
 a second power distribution cabinet output terminal connected to the second UPS first terminal; 
   a second output power distribution cabinet comprising:   a second output power distribution cabinet input terminal connected to the second UPS second terminal;   a second output power distribution cabinet output terminal connected to the second branch first terminal; and   a second battery connected to the second UPS third terminal.   
     
     
         12 . An air conditioning system, comprising:
 an alternating current (AC) bus configured to connect to two power supplies through a switching circuit;   a direct current (DC) bus;   a first AC/DC circuit comprising:
 a first AC/DC circuit input terminal connected to the AC bus; and 
 a first AC/DC circuit output terminal connected to the DC bus; 
   a first DC/AC circuit comprising:
 a first DC/AC circuit input terminal connected to the DC bus; and 
 a first PC/AC circuit output terminal configured to supply power to a first air conditioning load; 
   a first air conditioning load; and   a backup power supply apparatus connected to the DC bus or the AC bus, wherein the backup power supply apparatus is configured to provide electric energy to the DC bus or the AC bus when the two power supplies switch or fail to prevent the first air conditioning load from powering off.   
     
     
         13 . The air conditioning system of  claim 12 , wherein the backup power supply apparatus is specifically connected to the DC bus, and wherein the backup power supply apparatus comprises:
 a battery pack comprising a first voltage; and   a bidirectional direct current/direct current (DC/DC) circuit comprising:
 a DC/DC circuit first terminal connected to the DC bus; and 
 a DC/DC circuit second terminal connected to the batter/pack, and wherein the bidirectional DC/DC circuit is configured to:
 convert the first voltage into a second voltage of the first air conditioning load; and 
 convert a DC bus voltage into the first voltage to charge the batter pack. 
 
   
     
     
         14 . The air conditioning system of  claim 12 , wherein the backup power supply apparatus is connected to the AC bus, and wherein the backup power supply apparatus comprises:
 a battery pack comprising a first voltage; and   a bidirectional AC/DC circuit comprising:   a bidirectional AC/DC circuit input terminal a connected to the AC bus; and   a bidirectional AC/DC circuit output terminal connected to the battery pack, and wherein the bidirectional AC/DC circuit is configured to:
 convert AC power of the AC bus into DC power to charge the battery pack; and 
 convert the first voltage into a second voltage that matches a third voltage of the AC bus to supply power to the first air conditioning load. 
   
     
     
         15 . The air conditioning system of  claim 12 , further comprising a second AC/DC circuit comprising:
 a second AC/DC circuit input terminal connected to the AC bus; and   a second AC/PC circuit output terminal connected to the DC bus.   
     
     
         16 . The air conditioning system of  claim 12 , further comprising a second DC/AC circuit comprising:
 a second DC/AC circuit input terminal connected to the DC bus; and   a second DC/AC circuit output terminal configured to supply power to a second air conditioning load.   
     
     
         17 . The air conditioning system of  claim 16 , wherein the first air conditioning load comprises a fan, a compressor, or a pump. 
     
     
         18 . The air conditioning system of  claim 12 , wherein the first PC/AC circuit output terminal of is configured to supply power to the first air conditioning load. 
     
     
         19 . The air conditioning system of  claim 12 , further comprising:
 a switching circuit comprising:
 a first branch comprising a first branch first terminal configured to connect to a first power supply of the two power supplies; and 
 a second branch comprising a second branch first terminal configured to connect to a second power supply of the two power supplies, 
 wherein the first branch second terminal and the second branch second terminal are connected together to connect to the AC bus; and 
   a corresponding switching device of a plurality of switching devices connected in series on both the first branch and the second branch, and wherein the switching devices are configured to switch the first power supply and the second power supply.   
     
     
         20 . An air conditioning device, comprising:
 an alternating current (AC) bus configured to connect to two power supplies through a switching circuit;   a direct current (DC) bus;   a first AC/DC circuit comprising:
 a first AC/DC circuit input terminal connected to the AC bus; and 
 a first AC/DC circuit output terminal connected to the DC bus; 
   a first DC/AC circuit comprising:
 a first DC/AC circuit input terminal connected to the DC bus; and 
 a first PC/AC circuit output terminal configured to supply power to a first air conditioning load; and 
   a first air conditioning load coupled to the first DC/AC circuit, and   a backup power supply apparatus connected to the DC bus and the AC bus, wherein the backup power supply apparatus comprises at least a battery pack, and wherein the backup power supply apparatus is configured to provide electric energy for the DC bus or the AC bus when the two power supplies switch or fail, to prevent the first air conditioning load from powering off.